Take green lentil in a medium pot and add enough cool water to cover. Cook over medium heat.Drain excess water and set aside.Take rice in a medium pot add 3/4 cup of boiling water. Cover lid and cook over low heat. Take both green lentil and rice into a large mixing bowl and mix.Meanwhile, cut onion into halves and slice them thinly. Take olive oil and sliced onion into a medium size of skillet and saute it for 10 minutes over medium heat. Then add grated carrot to the skillet and saute it for another 10 minutes. Take sauteed onion and carrot to the mixing bowl.Add chopped green onion, chopped mint ( I used fresh mint instead of fresh dill ), sumac, lemon juice, black pepper and salt to the mixing bowl and mix.